20345310511061 has 8 divisors (see below), whose sum is σ = 20396158588344. Its totient is φ = 20294491504320.

The previous prime is 20345310511039. The next prime is 20345310511067. The reversal of 20345310511061 is 16011501354302.

It can be written as a sum of positive squares in 4 ways, for example, as 3439192504036 + 16906118007025 = 1854506^2 + 4111705^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20345310511061 - 2⁶ = 20345310510997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20345310511067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5865830 + ... + 8665943.

It is an arithmetic number, because the mean of its divisors is an integer number (2549519823543).

Almost surely, 2^{20345310511061} is an apocalyptic number.

It is an amenable number.

20345310511061 is a deficient number, since it is larger than the sum of its proper divisors (50848077283).

20345310511061 is a wasteful number, since it uses less digits than its factorization.

20345310511061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14535271.

The product of its (nonzero) digits is 10800, while the sum is 32.

Adding to 20345310511061 its reverse (16011501354302), we get a palindrome (36356811865363).

The spelling of 20345310511061 in words is "twenty trillion, three hundred forty-five billion, three hundred ten million, five hundred eleven thousand, sixty-one".